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Yeah that’s not a problem because I have to take the inlet end of once a week or two to remove any waste that wasn’t able to get in. The spaces in the end cap are less than a mm ive had week old snails all over it and they have had zero problems but I would rather be on the safe side with the shrimp thanks again

It maybe a good idea to put sponge over the inlet as the pull of the water with 400l/h may be strong and you won't want any nay shrimps draw into the filter. I would get course sponge so it doesn't restrict the flo inward too much, and you will need to keep removing it and squeezing it in a cup of tank water every so often (maybe twice a week should be sufficient, but you won't really know until you try) so it doesn't get blocked and burn out the pump motor! You will probably see shrimp grazing on it often. As you say, occasionally the shrimp will swim in the flow of water but generally most of the time they prefer quite still water. Simon

I wasn’t aware of the shrimp not liking any flow that being said My filter has a flow restrictor on it so I can adjust how strong also the outlet has the waterfall fitted and is facing almost directly towards the glass I’ve had it set up like that for a while now and to be completely honest with you two of the shrimp seem to enjoy it they will swim back add fourth through the flow and also try to swim up the flow as I sit and watch them. Oh also my inlet has extremely small holes and thin slices to try and not let anything else other than waste in but after reading the post I think I’ll cover it with a sponge just to be on safe side. Thanks for the information guys

400l/h is as you say overkill but it shouldn't be too much of a problem if the tank is specifically set up to avoid any strong flow, or if the water outlet is something like a water fall. My old shrimp tank is 30L and has 2x100l/h. Also Hammy is using that same filter system already in the 15L tank??? Hammy, try to avoid too much water movement in the new tank setup with the filter you have as, as crabby states, shrimp don't like strong water flow, there may be many different ways of doing this dependant on the system outlet type/design, for instance in my betta tank I have a sponge (meant to cover inlet tubes) covering the filter outlet, as betta don't like flow either! Simon

400lph on a 64ltr tank seems a bit like overkill, especially for a shrimp tank. There’s a chance you could have too much flow, and the shrimp wouldn’t appreciate it.